Filterbuy 20x25x1 MERV 13 Air Filters, 5-Pack

The Measurement System: Minimum Efficiency Reporting Value (MERV) The MERV rating scale ranges from 1 to 20, with higher numbers indicating the ability to capture smaller micron particles. This rating system provides a standardized way to evaluate a filter's effectiveness.

Standard Protection (90% Airborne Particles) MERV 8 Air Filters These filters are perfect for almost any home or business that wants great indoor air quality at a reasonable rate. They capture 90% of airborne particles ranging from 3 to 10 microns in size.

Superior Protection (95% Airborne Particles) MERV 11 Air Filters These filters are ideal for homes or businesses that need to account for factors like pets, smokers, and allergy sufferers. They capture 95% of airborne particles ranging from 1 to 3 microns in size.

Optimal Protection (98% Airborne Particles) MERV 13 Air Filters These filters are perfect for larger homes or businesses, and those who want the best possible filtration experience. They capture 98% of airborne particles ranging from 0.3 to 1 microns in size, including bacteria.

Odor Eliminator (90% Airborne Particles) MERV 8 Air Filters with Activated Carbon These filters are perfect for homes or businesses that want to inhibit unpleasant smells while maintaining reliable MERV 8 quality filtration.

Choosing the Correct Filter Size When selecting a replacement air filter, it's important to understand the difference between the nominal size (rounded to the nearest inch) and the actual size (precise measurement). All of our filters have both measurements listed to ensure a perfect fit.

Why Should I Change My Air Filter? Changing your air filter regularly is essential for maintaining a healthy indoor environment and protecting your HVAC system. Dirty filters can lead to respiratory issues, increased energy costs, and costly system repairs.

How Often Should I Change My Air Filter? We generally recommend replacing your filter every 90 days, but the exact frequency may vary based on factors such as filter size, pet ownership, allergy concerns, and the number of occupants in your home.

About Filterbuy Filterbuy is committed to providing high-quality, American-made air filters that improve indoor air quality and enable everyone to live and breathe freely. Our extensive selection of custom sizes, filtration ratings, and subscription services ensure that we have the perfect solution for your needs.

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